Arm rest



FIG. 1 is a top perspective view of an arm rest, showing my new design.

FIG. 2 is a bottom perspective view thereof.

FIG. 3 is a front elevational view thereof.

FIG. 4 is a rear elevational view thereof.

FIG. 5 is left-side elevational view thereof.

FIG. 6 is a right-side elevational view thereof.

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures show portions of the arm rest which form no part of the claimed design. 

CLAIM The ornamental design for an arm rest, as shown and described. 